Indeed is a job search and listing site that's valued at $550 million

Daniel Goodman / Business Insider

What it is:Indeed is a pay-per-click job listing and search site. It is one of the largest career sites on the web, boasting 1 billion monthly job searches. It works with 25,000 partnering sites and is profitable.

Foursquare is a location-based mobile app that's valued at $600 million

Wikimedia Commons

What it is: Foursquare is a location-based social networking mobile service. While it's still struggling to generate revenue, the location and personal data it has on users is very valuable. And if any startup is positioned to own the location space, it's Foursquare.